Evaluation of resin inlay restoration after root canal therapy for deciduous molars

Abstract

Objective To explore the clinical effect of composite resin inlays in repairing large areas of primary mo⁃ lar defects after root canal treatment to provide a reference for the restoration of carious primary molars. Methods Thirty⁃eight primary molars of 32 children were selected as the research objects. Indirect restoration with composite res⁃ in inlays was performed after root canal therapy. The clinical efficacy was evaluated in terms of five indices, including restoration retention, marginal integrity, gingival status, anatomical morphology and secondary caries, according to the modified USHPS evaluation criteria, at 6, 12 and 18 months after restoration. Results During the 18⁃month follow⁃up period, 36 of the 38 teeth were successfully restored, and all the evaluated items reached grade A or B. Six months after the repair, one prosthesis had fallen off, resulting in a success rate of 97.37% (37/38). The success rate remained 97.37% (37/38) 12 months after the repair; 18 months after the repair, another prosthesis had failed(Marginal integrity and anatomical morphology were grade C), reducing the success rate to 94.74% (36/38). There was no significant differ⁃ ence in the success rate of resin inlay repair at 6, 12 or 18 months (c2＝0.518, P＝0.772). Conclusion Composite res⁃ in inlay restoration is an alternative method for repairing primary molars with large defects after root canal treatment.

Keywords

• Primary mola
• Composite resin
• Inlay
• Root canal therapy
• Dental defect